Home / 20,705.80-28,577.74-12,207.44

Finding the Fourth Proportional to 20,705.80, 28,577.74 and 12,207.44

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Solution

The fourth proportional to 20,705.80, 28,577.74 and 12,207.44 is: 16,848.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.80 : 28,577.74 = 12,207.44 : x
  2. Step 2: Convert to fraction form
    20,705.80/28,577.74 = 12,207.44/x
  3. Step 3: Cross multiply
    20,705.80x = 28,577.74 × 12,207.44
  4. Step 4: Simplify right side
    20,705.80x = 348,861,046.39
  5. Step 5: Solve for x
    x = 348,861,046.39/20,705.80
  6. Step 6: Final answer
    x = 16,848.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.